diff options
Diffstat (limited to 'gdb/config/i386/tm-i386.h')
| -rw-r--r-- | gdb/config/i386/tm-i386.h | 179 |
1 files changed, 144 insertions, 35 deletions
diff --git a/gdb/config/i386/tm-i386.h b/gdb/config/i386/tm-i386.h index 44e58d1510d..051b3c70176 100644 --- a/gdb/config/i386/tm-i386.h +++ b/gdb/config/i386/tm-i386.h @@ -76,10 +76,40 @@ extern int i386_skip_prologue PARAMS ((int)); #define REGISTER_SIZE 4 -/* Number of machine registers */ - -#define NUM_FREGS 0 /*8*/ /* Number of FP regs */ -#define NUM_REGS (16 + NUM_FREGS) /* Basic i*86 regs + FP regs */ +/* This register file is parameterized by two macros: + HAVE_I387_REGS --- register file should include i387 registers + HAVE_SSE_REGS --- register file should include SSE registers + If HAVE_SSE_REGS is #defined, then HAVE_I387_REGS must also be #defined. + + However, GDB code should not test those macros with #ifdef, since + that makes code which is annoying to multi-arch. Instead, GDB code + should check the values of NUM_GREGS, NUM_FREGS, and NUM_SSE_REGS, + which will eventually get mapped onto architecture vector entries. + + It's okay to use the macros in tm-*.h files, though, since those + files will get completely replaced when we multi-arch anyway. */ + +/* Number of general registers, present on every 32-bit x86 variant. */ +#define NUM_GREGS (16) + +/* Number of floating-point unit registers. */ +#ifdef HAVE_I387_REGS +#define NUM_FREGS (16) +#else +#define NUM_FREGS (0) +#endif + +/* Number of SSE registers. */ +#ifdef HAVE_SSE_REGS +#define NUM_SSE_REGS (9) +#else +#define NUM_SSE_REGS (0) +#endif + +#define NUM_REGS (NUM_GREGS + NUM_FREGS + NUM_SSE_REGS) + +/* Largest number of registers we could have in any configuration. */ +#define MAX_NUM_REGS (16 + 16 + 9) /* Initializer for an array of names of registers. There should be at least NUM_REGS strings in this initializer. Any excess ones are simply ignored. @@ -87,13 +117,18 @@ extern int i386_skip_prologue PARAMS ((int)); scheme (which is the same as the 386 scheme) and also regmap in the various *-nat.c files. */ -#define REGISTER_NAMES { "eax", "ecx", "edx", "ebx", \ - "esp", "ebp", "esi", "edi", \ - "eip", "eflags", "cs", "ss", \ - "ds", "es", "fs", "gs", \ - "st0", "st1", "st2", "st3", \ - "st4", "st5", "st6", "st7", \ - } +#define REGISTER_NAMES { "eax", "ecx", "edx", "ebx", \ + "esp", "ebp", "esi", "edi", \ + "eip", "eflags", "cs", "ss", \ + "ds", "es", "fs", "gs", \ + "st0", "st1", "st2", "st3", \ + "st4", "st5", "st6", "st7", \ + "fctrl", "fstat", "ftag", "fcs", \ + "fcoff", "fds", "fdoff", "fop", \ + "xmm0", "xmm1", "xmm2", "xmm3", \ + "xmm4", "xmm5", "xmm6", "xmm7", \ + "mxcsr" \ + } /* Register numbers of various important registers. Note that some of these values are "real" register numbers, @@ -102,53 +137,127 @@ extern int i386_skip_prologue PARAMS ((int)); to be actual register numbers as far as the user is concerned but do serve to get the desired values when passed to read_register. */ -#define FP_REGNUM 5 /* (ebp) Contains address of executing stack frame */ +#define FP_REGNUM 5 /* (ebp) Contains address of executing stack + frame */ #define SP_REGNUM 4 /* (usp) Contains address of top of stack */ #define PC_REGNUM 8 /* (eip) Contains program counter */ #define PS_REGNUM 9 /* (ps) Contains processor status */ -#define FP0_REGNUM 16 /* (st0) 387 register */ -#define FPC_REGNUM 25 /* 80387 control register */ +/* These registers are present only if HAVE_I387_REGS is #defined. + We promise that FP0 .. FP7 will always be consecutive register numbers. */ +#define FP0_REGNUM 16 /* first FPU floating-point register */ +#define FP7_REGNUM 23 /* last FPU floating-point register */ + +/* All of these control registers are sixteen bits long (at most) in + the FPU, but are zero-extended to thirty-two bits in GDB's register + file. This makes it easier to compute the size of the control + register file, and somewhat easier to convert to and from the FSAVE + instruction's 32-bit format. */ +#define FIRST_FPU_CTRL_REGNUM 24 +#define FCTRL_REGNUM 24 /* FPU control word */ +#define FPC_REGNUM 24 /* old name for FCTRL_REGNUM */ +#define FSTAT_REGNUM 25 /* FPU status word */ +#define FTAG_REGNUM 26 /* FPU register tag word */ +#define FCS_REGNUM 27 /* FPU instruction's code segment selector + 16 bits, called "FPU Instruction Pointer + Selector" in the x86 manuals */ +#define FCOFF_REGNUM 28 /* FPU instruction's offset within segment + ("Fpu Code OFFset") */ +#define FDS_REGNUM 29 /* FPU operand's data segment */ +#define FDOFF_REGNUM 30 /* FPU operand's offset within segment */ +#define FOP_REGNUM 31 /* FPU opcode, bottom eleven bits */ +#define LAST_FPU_CTRL_REGNUM 31 + +/* These registers are present only if HAVE_SSE_REGS is #defined. + We promise that XMM0 .. XMM7 will always have consecutive reg numbers. */ +#define XMM0_REGNUM 32 /* first SSE data register */ +#define XMM7_REGNUM 39 /* last SSE data register */ +#define MXCSR_REGNUM 40 /* Streaming SIMD Extension control/status */ + +#define IS_FP_REGNUM(n) (FP0_REGNUM <= (n) && (n) <= FP7_REGNUM) +#define IS_SSE_REGNUM(n) (XMM0_REGNUM <= (n) && (n) <= XMM7_REGNUM) + +#define FPU_REG_RAW_SIZE (10) + +/* Sizes of individual register sets. These cover the entire register + file, so summing up the sizes of those portions actually present + yields REGISTER_BYTES. */ +#define SIZEOF_GREGS (NUM_GREGS * 4) +#define SIZEOF_FPU_REGS (8 * FPU_REG_RAW_SIZE) +#define SIZEOF_FPU_CTRL_REGS \ + ((LAST_FPU_CTRL_REGNUM - FIRST_FPU_CTRL_REGNUM + 1) * 4) +#define SIZEOF_SSE_REGS (8 * 16 + 4) + /* Total amount of space needed to store our copies of the machine's register state, the array `registers'. */ - -#define REGISTER_BYTES ((NUM_REGS - NUM_FREGS)*4 + NUM_FREGS*10) +#ifdef HAVE_SSE_REGS +#define REGISTER_BYTES \ + (SIZEOF_GREGS + SIZEOF_FPU_REGS + SIZEOF_FPU_CTRL_REGS + SIZEOF_SSE_REGS) +#else +#ifdef HAVE_I387_REGS +#define REGISTER_BYTES (SIZEOF_GREGS + SIZEOF_FPU_REGS + SIZEOF_FPU_CTRL_REGS) +#else +#define REGISTER_BYTES (SIZEOF_GREGS) +#endif +#endif /* Index within `registers' of the first byte of the space for register N. */ - -#define REGISTER_BYTE(N) \ - (((N) < FP0_REGNUM) ? ((N) * 4) : ((((N) - FP0_REGNUM) * 10) + 64)) +#define REGISTER_BYTE(n) (i386_register_byte[(n)]) +extern int i386_register_byte[]; /* Number of bytes of storage in the actual machine representation for - register N. All registers are 4 bytes, except 387 st(0) - st(7), - which are 80 bits each. */ - -#define REGISTER_RAW_SIZE(N) (((N) < FP0_REGNUM) ? 4 : 10) + register N. */ +#define REGISTER_RAW_SIZE(n) (i386_register_raw_size[(n)]) +extern int i386_register_raw_size[]; /* Largest value REGISTER_RAW_SIZE can have. */ - -#define MAX_REGISTER_RAW_SIZE 10 +#define MAX_REGISTER_RAW_SIZE 16 /* Number of bytes of storage in the program's representation for register N. */ - -#define REGISTER_VIRTUAL_SIZE(N) (((N) < FP0_REGNUM) ? 4 : 8) +#define REGISTER_VIRTUAL_SIZE(n) (i386_register_virtual_size[(n)]) +extern int i386_register_virtual_size[]; /* Largest value REGISTER_VIRTUAL_SIZE can have. */ - -#define MAX_REGISTER_VIRTUAL_SIZE 8 +#define MAX_REGISTER_VIRTUAL_SIZE 16 /* Return the GDB type object for the "standard" data type of data in register N. Perhaps si and di should go here, but potentially they could be used for things other than address. */ -#define REGISTER_VIRTUAL_TYPE(N) \ - (((N) == PC_REGNUM || (N) == FP_REGNUM || (N) == SP_REGNUM) \ - ? lookup_pointer_type (builtin_type_void) \ - : (((N) < FP0_REGNUM) \ - ? builtin_type_int \ - : builtin_type_double)) +#define REGISTER_VIRTUAL_TYPE(N) \ + (((N) == PC_REGNUM || (N) == FP_REGNUM || (N) == SP_REGNUM) \ + ? lookup_pointer_type (builtin_type_void) \ + : IS_FP_REGNUM(N) ? builtin_type_double \ + : IS_SSE_REGNUM(N) ? builtin_type_v4sf \ + : builtin_type_int) + +/* REGISTER_CONVERTIBLE(N) is true iff register N's virtual format is + different from its raw format. Note that this definition assumes + that the host supports IEEE 32-bit floats, since it doesn't say + that SSE registers need conversion. Even if we can't find a + counterexample, this is still sloppy. */ +#define REGISTER_CONVERTIBLE(n) (IS_FP_REGNUM (n)) + +/* Convert data from raw format for register REGNUM in buffer FROM + to virtual format with type TYPE in buffer TO. */ +extern void i387_to_double (char *, char *); + +#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,TYPE,FROM,TO) \ +{ \ + double val; \ + i387_to_double ((FROM), (char *)&val); \ + store_floating ((TO), TYPE_LENGTH (TYPE), val); \ +} + +extern void double_to_i387 (char *, char *); + +#define REGISTER_CONVERT_TO_RAW(TYPE,REGNUM,FROM,TO) \ +{ \ + double val = extract_floating ((FROM), TYPE_LENGTH (TYPE)); \ + double_to_i387((char *)&val, (TO)); \ +} /* Store the address of the place in which to copy the structure the subroutine will return. This is called from call_function. */ |